test/init-mem: test io_uring_queue_init_mem() with various sizes

Include a pre and post redzone of what liburing tells us it used, and
run 2 * CQ size number of operations on the ring, verifying if the
pre and post redzones are intact after each round.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 files changed